<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<div id="root">

</div>
<script>
    const root = document.getElementById('root');
    let arr = [11, 15, 114, 16, 11, 15]
    root.innerHTML = '原数组：' + arr + '<br/>';

    function noRepeat(arr) {
        arr.forEach((value, index) => {
            for (let i = index + 1; i < arr.length; i++) {
                if (arr[i] === value) {
                    arr.splice(i, 1)
                }
            }
        })
        return arr
    }

    root.innerHTML += '去重后' + noRepeat(arr)

</script>

</body>
</html>